vendor: update buildkit to crazy-max/buildkit@exporter-local-mirror

[crazy-max]

testing moby/buildkit#6561

[crazy-max]

Testing with multi-platform:

$ docker buildx --builder builder bake binaries-cross --set *.platform=linux/amd64,linux/arm64 --print
#1 [internal] load local bake definitions
#1 reading docker-bake.hcl 4.94kB / 4.94kB done
#1 DONE 0.0s
{
  "group": {
    "default": {
      "targets": [
        "binaries-cross"
      ]
    }
  },
  "target": {
    "binaries-cross": {
      "context": ".",
      "dockerfile": "Dockerfile",
      "args": {
        "BUILDKIT_CONTEXT_KEEP_GIT_DIR": "1"
      },
      "target": "binaries",
      "platforms": [
        "linux/amd64,linux/arm64"
      ],
      "output": [
        {
          "dest": "./bin/build",
          "mode": "delete",
          "type": "local"
        }
      ]
    }
  }
}

$ tree -anh ./bin/build
[4.0K]  ./bin/build
├── [   0]  baz.txt
└── [ 61M]  buildx

0 directories, 2 files

$ docker buildx --builder builder bake binaries-cross --set *.platform=linux/amd64,linux/arm64
#0 building with "builder" instance using docker-container driver

#1 [internal] load local bake definitions
#1 reading docker-bake.hcl 4.94kB / 4.94kB done
#1 DONE 0.0s

#2 [internal] load build definition from Dockerfile
#2 transferring dockerfile: 6.43kB 0.0s done
#2 DONE 0.1s

#3 [auth] tonistiigi/xx:pull token for registry-1.docker.io
#3 DONE 0.0s

#4 [auth] library/golang:pull token for registry-1.docker.io
#4 DONE 0.0s

#5 [linux/amd64 internal] load metadata for docker.io/library/golang:1.25-alpine3.23
#5 ...

#6 [linux/amd64 internal] load metadata for docker.io/tonistiigi/xx:1.7.0
#6 DONE 0.6s

#5 [linux/amd64 internal] load metadata for docker.io/library/golang:1.25-alpine3.23
#5 DONE 0.7s

#7 [internal] load .dockerignore
#7 transferring context: 45B 0.0s done
#7 DONE 0.1s

#8 [internal] load build context
#8 DONE 0.0s

#9 [linux/amd64 xx 1/1] FROM docker.io/tonistiigi/xx:1.7.0@sha256:010d4b66aed389848b0694f91c7aaee9df59a6f20be7f5d12e53663a37bd14e2
#9 resolve docker.io/tonistiigi/xx:1.7.0@sha256:010d4b66aed389848b0694f91c7aaee9df59a6f20be7f5d12e53663a37bd14e2 0.0s done
#9 DONE 0.0s

#10 [linux/amd64 golatest 1/1] FROM docker.io/library/golang:1.25-alpine3.23@sha256:8e02eb337d9e0ea459e041f1ee5eece41cbb61f1d83e7d883a3e2fb4862063fa
#10 resolve docker.io/library/golang:1.25-alpine3.23@sha256:8e02eb337d9e0ea459e041f1ee5eece41cbb61f1d83e7d883a3e2fb4862063fa 0.0s done
#10 DONE 0.0s

#8 [internal] load build context
#8 transferring context: 61.61kB 4.9s
#8 transferring context: 128.68kB 10.0s
#8 transferring context: 200.15kB 15.0s
#8 transferring context: 1.38MB 20.1s
#8 transferring context: 68.95MB 25.2s
#8 transferring context: 76.93MB 30.3s
#8 transferring context: 87.43MB 35.4s
#8 transferring context: 105.79MB 40.4s
#8 transferring context: 126.82MB 45.5s
#8 transferring context: 139.75MB 49.6s done
#8 DONE 49.6s

#11 [linux/amd64 gobase 1/3] COPY --from=xx / /
#11 CACHED

#12 [linux/amd64 gobase 2/3] RUN apk add --no-cache file git
#12 CACHED

#13 [linux/amd64 gobase 3/3] WORKDIR /src
#13 CACHED

#14 [linux/amd64 buildx-version 1/1] RUN --mount=type=bind,target=. <<EOT (set -e...)
#14 0.560 -X github.com/docker/buildx/version.Version=v0.33.0-rc1-3-g26bb9174a.m -X github.com/docker/buildx/version.Revision=26bb9174a694281a462ec513cefb559018bbdcc2.m -X github.com/docker/buildx/version.Package=github.com/docker/buildx
#14 0.561 v0.33.0-rc1-3-g26bb9174a.m
#14 DONE 0.8s

#15 [linux/amd64 buildx-build 1/1] RUN --mount=type=bind,target=.   --mount=type=cache,target=/root/.cache   --mount=type=cache,target=/go/pkg/mod   --mount=type=bind,from=buildx-version,source=/tmp/.ldflags,target=/tmp/.ldflags <<EOT (set -ex...)
#15 0.127 + cat /tmp/.ldflags
#15 0.127 + xx-go build -trimpath -ldflags '-s -w -X github.com/docker/buildx/version.Version=v0.33.0-rc1-3-g26bb9174a.m -X github.com/docker/buildx/version.Revision=26bb9174a694281a462ec513cefb559018bbdcc2.m -X github.com/docker/buildx/version.Package=github.com/docker/buildx' -o /usr/bin/docker-buildx ./cmd/buildx
#15 ...

#16 [linux/amd64->arm64 buildx-build 1/1] RUN --mount=type=bind,target=.   --mount=type=cache,target=/root/.cache   --mount=type=cache,target=/go/pkg/mod   --mount=type=bind,from=buildx-version,source=/tmp/.ldflags,target=/tmp/.ldflags <<EOT (set -ex...)
#16 0.125 + cat /tmp/.ldflags
#16 0.126 + xx-go build -trimpath -ldflags '-s -w -X github.com/docker/buildx/version.Version=v0.33.0-rc1-3-g26bb9174a.m -X github.com/docker/buildx/version.Revision=26bb9174a694281a462ec513cefb559018bbdcc2.m -X github.com/docker/buildx/version.Package=github.com/docker/buildx' -o /usr/bin/docker-buildx ./cmd/buildx
#16 ...

#15 [linux/amd64 buildx-build 1/1] RUN --mount=type=bind,target=.   --mount=type=cache,target=/root/.cache   --mount=type=cache,target=/go/pkg/mod   --mount=type=bind,from=buildx-version,source=/tmp/.ldflags,target=/tmp/.ldflags <<EOT (set -ex...)
#15 10.16 + file /usr/bin/docker-buildx
#15 10.18 /usr/bin/docker-buildx: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, BuildID[sha1]=72bbe1304d4322566d8f84e392cdbbd0a9442fe5, stripped
#15 10.18 + xx-verify --static /usr/bin/docker-buildx
#15 DONE 11.2s

#16 [linux/amd64->arm64 buildx-build 1/1] RUN --mount=type=bind,target=.   --mount=type=cache,target=/root/.cache   --mount=type=cache,target=/go/pkg/mod   --mount=type=bind,from=buildx-version,source=/tmp/.ldflags,target=/tmp/.ldflags <<EOT (set -ex...)
#16 10.18 + file /usr/bin/docker-buildx
#16 10.19 /usr/bin/docker-buildx: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, BuildID[sha1]=6f2ef8d8a735bb06f8914feba115c2f7f6be6b31, stripped
#16 10.19 + xx-verify --static /usr/bin/docker-buildx
#16 DONE 11.2s

#17 exporting to client directory
#17 copying files
#17 copying files 124.09MB 1.6s done
#17 DONE 1.8s

$ tree -anh ./bin/build
[4.0K]  ./bin/build
├── [4.0K]  linux_amd64
│   └── [ 61M]  buildx
└── [4.0K]  linux_arm64
    └── [ 57M]  buildx

2 directories, 2 files